Compressor



vFeb. 10, 1931., A. E. ELMORE 1,791,958

COMPRES SOR Filed April 30, 1929 -3 Sheets-Sheet l IN VEN TOR. 5 Mimic-more BY WMZZZM mm ATTORNEYS.

Feb. 10, 1931. A ELMQRE 1,791,958

COMPRESSOR Filed April 50. 1929 3 Sheets-Sheet 2 INVENTOR. 6M5]? E E/more,

ATTORNEYS.

A. E. ELMORE Feb. 10, 1931.

COMPRESSOR s Sheets-Shet :5

Filed April 30, 1929 ATTORNEYS.

Patented Feb. 10, 1931 gumrnn .FS'TATEVSK ATE T o IcfE AUSTIN n. ELMORE, LOS ANGnLEs, CALIFORNIA COMPRESSOR Application filed April 30,

This invention relates to compressor unit for supplying a fluid under'pressure andinvolves details of construction contributing to ehiciency, long life, compactness andsll lence of operation. The present invention 'appertains to av rotary compressor having reciprocable. vanes and provided with a mu'flier means on the intake SldQ. and a 'd1scharge air chamber.

The objectsof this invention are 1:01 m;

vide a unit of thecharacter described having any or all of the following features: a loose ring in the rotor to cause .the'van'es to follow the wall of the rotor chamber; novel passing means for the vanes; a discharge chamber. having lubricant separatlng means; an oil-passage for delivery of'separ ated lubricant to the rotor chamber; a regulating valve for controlling the actuated fluid pressure and bypassing air oractuated fluid from the discharge chamberto the in- 1 ake; a 'muftler intake chamber; andnovel muflling means.

These objects together With other objects" and corresponding accomplishments are obtained by means of the embodiments of my invention illustrated jin the accompanying drawings in which i Fig. 1 is an elevation of the complete'unit;

" Fig. 2'is a front elevation thereof; Fig.3 is a vertical sectionas seen on the line' 33 of Fig. 2; Fig. at 'is a-section on the line 44of Fig. 3; Figs. 5, 6 and 7 are sections as seen on the lines correspondingly num "bered in Fig. 4; and Fig. '8 is a-section as seen on the line 88 of Fig. 5.

' Referring with more particularity to the drawings, the unit comprises a rotary pump A having an intake chamber B and a receiver or discharge chamber C. A pressure regulating valve is marked D and a rotary in take-mufller E.

Referring more specifically to the rotary pump, it comprises a shell 10 provided with peripheral cooling ribs and having abase 11 for supporting the unit upon any suitable bed. Closing the ends of the shell are heads 12-and 18. The-heads are provided with extensions to receive ball bearings indicatedgenerally by 14 and 15. These contact with the Wall of the shell.

1929. Serial No. 359,213.

bearings have a drive shaft 16 journalled therein,- the drive shaft being mounted ecc-entricto the "periphery of the shell. Fixed to the drive shaft is a cylindrical ,rotor 17 having recesses on opposite sides to receive rings 18 and 19. The rings are loosely mounted and engage vanes'20 which are reciprocably'mounted in the rotor so as to be movable radially in relation to the latter.

The rings are of such external diameter; that they cause the vanes to.follow the Wallof the shell in their rotation. In order to pro vide an efficient leak tight packing between the 'vanes and the shell, packing strips 21 are mounted in grooves in the vanes and are urged outwardly by compression springs 22.

Theconstruction is such that upon rotationofthe rotor, the vanes Will be maintained in The rotor is mounted so that its closest approach to the shell is at the top of the latter. Extending across the shell and opening through the head is "an. intake 23"having a The head of theneedle valve is disposedso that the'latter may be adjustedto regulate the flow of oil through port 25?).

Mounted over the head 13 is the receiver chamber-dome 27 provided with a boss 28 haviniqiachamber registeringwiththe intake 23. K i port 29 serves for communication of the chamber in the boss with the compartment of the receiver chamber. A shoulder isiprovided in the receiver chamber anda partitionwall 30 is disposed therein dividing the chamber into an outlet compartment 31 p'orts230; communicating with a rotor chame.

and: a dischargecompartment 32. A port 33 .for passage of the compressed fiuid from-the outlet compartment to the discharge compartment is provided in the partition wall and on the discharge compartment side of the wall is a baflle 34 ranging downwardly from the port 33. This baflie is to arrest oil or lubricant which may pass through the port. At the lowest side of the partition wall is an oil port 35 for oil to drain from the discharge compartment into the outlet compartment. A passage 36 is provided in the receiver dome and communicates with a port in the head 13 which opens to the oil duct 25. Oil which collects in the receiver chamber may drain gravitatively into the oil duct and be moved upwardly to the intake where it is mixed with the incoming air and delivered to the rotor chamber. The receiver dome has a discharge outlet 37, which opens to the discharge compartment through an entry passage 38 formed on the wall 01? the dome. The entry passage assists in preventing oil from passing from the receiver chamber, a tert-uous passage for the air being formed by the baiile and the entry passage.

In the bore of the boss is a cage 39 for a valve of the poppet type 40, this valve having a stem 41 threaded at its outer end. The sleeve is provided with a cylindrical enlarged portion 42 upon which is mounted a collar 43. A compression spring for the valve is marked 44 and abuts a spring seat 45 threaded upon the end of the stem so that by turning the spring seat, the compression of the spring 44 may be adjusted. The spring seat is in the form of a nut having flat sides and is slidably received in a wrench member 46 fixed to a rotatable head 47. The rotatable head is conveniently secured to the collar 43 by means of a split expansion ring mounted in corresponding recesses in the head and the collar. The valve seats so that it opens from the discharge side of the compressor into the intake, and may be adjusted so that the discharge pressure is suiiicient, the valve 40 will unseat and from this the compressed fluid can be bypassed into the intake. The ressure at which this occurs may be adjusted by turning the head 47.

Mounted over the head 12 is an intake dome shell 49 having an extension 50 registering with the intake 23. A port 51 serves for communication between the compartment of the intake dome and the chamber in extension 40 placing the intake dome in communication with the intake of the compressor. Disposed about and fixed on the drive shaft 16 is a rotary muifler bushing 52 having ports and passages 53 which serve for communication of the intake compartment with the atmosphere or source of supply of fluid to be compressed. Air is drawn through the rotary muiiler into the intake chamber and thence to the intake, and due to the radial direction of the passages, the mufller acts as a centrifugal impeller to aid in the introduction of air.

In the operation of the unit, rotation of the rotor causes air to be drawn from the intake chamber to the intake and thence into the rotor chamber from whence it is moved to the outlet ports 24a and compressed in its passage. Under normal operating conditions, the air passes from the outlet into the receiver chamber where the oil is separated and the cleaned compressed air then passes through the entry passage 38 and out the discharge 37, and may be delivered by a suitable pipe or hose to the point desired. Lubricant is initially supplied through the rotor chamber. Some of this lubricant will be carried out through the outlet into the receiver chamber and will drain from the latter through the oil duct 25 baclrto the intake of the compressor. If for any reason an air pressure in the receiver chamber should increase beyond the amount desired and for which the poppet valve is set, then the poppet valve will open and air is delivered back to the intake of the compressor. The operation is silent, a high degree of pressure may be obtained, and this is eifectively regulated by the poppet valve. Clean air is delivered and due to the receiver chamber without pulsation. Furthermore, silence is obtained by reason of the intake muifler and the receiver chamber.

What I claim is 1. A fluid compressor unit including a rotary pump comprising a rotor chamber having a cylindrical shell and heads thereon. a rotor eccentrically mounted with relation to said chamber, reciprocable vanes mounted in said rotor, a ring loosely mounted in said rotor and bearing against the inner ends of said vanes to cause the latter to follow the wall of said chamber, an intake in said chamber for fluid, an outlet in said chamber for fluid; a receiver chamber disposed on the side of said rotor chamber comprising an air dome, a partition wall dividing said chamber into an outlet compartment and a discharge compartment and having a fluid port at one side for passage of fluid therethrough, said outlet compartment directly communicating with said outlet, said partition wall having an oil port for gravitative flow of oil from said discharge compartment to said outlet compartment, a baille disposed in said discharge compartment over said fluid port and ranging toward said oil port, a discharge outlet communicating with said discharge compartment, an oil duct formed between the head on the receiver chamber side of said rotor chamber and said shell leading from the bottom of said outlet chamber to said intake.

2. A fluid compressor unit including a rotary pump comprising a rotor chamber having a cylindrical shell and head mounted thereon, a rotor eccentrically mounted with relation to said chamber, reciprocable vanes mounted in said rotor, a ring loosely mount ed in said rotor and bearing against the inner chamber, an outlet for said chamber; a re ends of saidvanes to cause the latter to follow the wall of. said chamber, an intake in said chamber for fluid, an outlet in said chamber for fluid; a receiver chamber disposed on the side of said rotor chamber comprising an air dome, a partitionwall dividing said cham ber into an outlet compartment and a dis-j port and ranging toward said oil port, a discharge outlet communicating with said discharge compartment, an oil duct formed be tween the head on the receiver chamber side or" said rotor chamber and said shell leading from the bottom of said outlet chamber to said intake, and a valve for regulating the flow of oil through said duct. 7

8. A fluid compressor unit including a rotary pump comprising a rotor chamber, a rotor eccentrically mounted with relation to s d chamber, reciprocable vanes mounted in s id rotor, a ring loosely mounted in said ro tor and bearing againstthe innerends ot' said vanes to cause the'latter to tollow the wall of said chamber; an intake chamber on said rotor chamber comprising a dome dis- 7 posed over a head on said rotor chamber, a drive shaft for said rotor extending through said intake chamber, a rotary mutfler buslr in the wall of said intake chamber and through which said drive shaft passes, said muifler bushing having a multiplicity of ports placing the compartment of said intake chamber in communication with the source of supply for the fluid to be con pressed, said intalre'chainber communicating with the intake of said rotor.

A fluid compressor unit including a ropump comprising a rotor chamber, rotor eccentrically mounted with relation to said chamber, reciprocable vanes mounted in said rotor, a ring loosely mounted in said rotor and bearingv against the inner ends'ot said vanes to cause the latter to follow the wall of said chamb 1" an intake for said ceiver chamber disposed on the side of rotor chamber comprising an air dome, said receiver chamber directly communicating with outlet, a discharge outlet communicating with said receiver chamber; an intake chamber on said rotor chamber comprising a dome disposed over the other head of said rotor chamber, a drive shaft for said rotor extending through said intake chambar, a mufiler bushing in the wall of said intake chamber and through which said drive shaft passes, said ,muflier bushing having a multiplicity of ports placing the compartment oi said intake chamber into communication with the sourceot supplyfor the fluid to be compressed, said intake communicating with the compartment of said intake chainber.- V

5. A. fluid compressor unit including a rotary pump comprising a rotor chamber,a rotor eccentrically mounted with relatlon to' said chamber, 'reciprocable vanes mounted in said rotor, a ring loosely mounted in said rotor and bearing against the inner ends of said vanes to cause the latter to follow the wall of said chamber, an intaketor said chamber, an outlet for said chamber; a re ceiver chamber disposed on rotor chamber comprising an air dome,- said receiver chamber directly communicating with said outlet, a discharge outlet communicating with said receiver chamber; an intake chamber on said'rotor chamber comprising a dome disposed over the otherheadofsaid rotor chamber, a drive shaft for said rotor extending through said intake chamberya inuflier bushing in the wall of said intake chamber through which said drive shaft passes, sald muffler bushing having a mult1- plicity of ports placing the compartment of said intake in communication with the source of supply for fluid to be compressed, said intake extending to said receiver chamber, a pressure regulating value controlling the communication of said receiver chamber with said intake. 7 i v 6. A fluid compressor unlt including a rop comprising a rotor chamber, a 1'0- rically mounted with relation to said chamber, reciprocable ran-es mounted in said rotor, a ring and bearing against the inner ends 01 said vanes to cause the latter to follow the Wall of said chamber, and intake for said chamber, an outlet for said chamber; a receiver chamber disposed on the side of said rotor chamber comprising an air dome, said receiver chamber directly communicating with said outlet, a discharge outlet communicating with said receiver chamber; an intake chamber on said rotor chamber comprising a'dome tary pi disposed over the other head of said rotor chamber, a drive shaft for said rotor extending through said intake chamber, a muffler bushing in the wall of said intake chamber and through which said drive shaftpass'es, said mutfler having a multiplicity of ports placing the compartment of said intake chamber int-o communication with the source of supply for the fluid to be compressed, said intake chamber and intake being in communication, said intake extending to said receiver chamber, a pressure poppet regulating valve controlling communication of said receiver chamber with said intake, a spring to urge said valve to its seat and means to adjust the spring effort. V

the side of said loosely mounted in said rotor 7. A fluid compressor unit including a rotary pump comprising a rotor chamber, a rotor eccentrically mounted with relation to said chamber, reciprocable vanes mounted in said rotor, a ring loosely mounted in said rotor and bearing against the inner ends of said vanes to cause the latter to follow the Wall of said chamber, an intake for said chamber, an outlet for said chamber; a receiver chamber disposed on the side of said. rotor chamber comprising an air dome, said receiver chamber directly communicating with said outlet, a discharge outlet communicating with said receiver chamber, an intake chamber on said rotor chamber comprising a dome disposed over the other head of said rotor chamber, a drive shaft for said rotor extending through said intake chamber, a mufiier bushing in the Wall of said intake chamber and through which said drive shaft passes, said mufiier bushing having a multiplicity of ports placing the compartment oi said intake chamber in connnunication with the source of supply for the fluid to be compressed, the compartment of said intake chamber communicating with said intake, said intake extending to said receiver chamher, a pressure poppet regulating valve controlling communication of said receiver chamber with said intake, said valve having a stem, a spring to urge said valve to its seat, a spring seat member threaded on said stem for adjusting the spring effort, and means on the outside of said unit to adjust said spring.

In Witness that I claim the foregoing I have hereunto subscribed my name this 24th day of April, 1929.

AUSTIN E. ELMORE. 

